. >>> fbi agents arrested the mayor of trenton, new jersey, on corruption charges today. now, these charges against mayor tony mack stem from a project to build a parking garage on city property. he is accused in a conspiracy that involves cash payments from the developer totalling $119,000. in july agents raided mack's home as well as the homes of his brother and a campaign supporter. mack denies violating the public trust. >>> and teachers in chicago are on picket lines instead of inside the classes rooms today. they have shut down the school system. shut out almost 400,000 students today. want to bring in casey wyan. he is outside an elementary school. i understand that negotiations are now ongoing. tell us what is the dispute? what are they trying to get to the bottom of between the teachers union and school administrators? >> reporter: well, interestingly enough, suzanne, it doesn't seem to be about money as much anymore. the teachers union saying that they are very close to accepting the school district's proposal of a 16% raise over the next four years. the average